Which of the Following Is True of the Confederacy and Native

Which of the following is true of the Confederacy and Native Americans?

A) Indians were united in their opposition to the Confederacy because of its white supremacist policies.
B) The Davis administration ordered the Navajo to leave their ancestral territory.
C) Slave-owning Indians generally supported the Confederacy.
D) Treating Indian tribes as fully independent nations, the Confederacy sent ambassadors to the Five Civilized Tribes.
E) Confederate troops massacred Indians on several occasions, most notably at Sand Creek, Texas.